2871857 has 2 divisors, whose sum is σ = 2871858. Its totient is φ = 2871856.

The previous prime is 2871853. The next prime is 2871877. The reversal of 2871857 is 7581782.

2871857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1739761 + 1132096 = 1319^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2871857 - 2² = 2871853 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2871857.

It is not a weakly prime, because it can be changed into another prime (2871853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1435928 + 1435929.

It is an arithmetic number, because the mean of its divisors is an integer number (1435929).

2^2871857 is an apocalyptic number.

It is an amenable number.

2871857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2871857 is an equidigital number, since it uses as much as digits as its factorization.

2871857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 38.

The square root of 2871857 is about 1694.6554222024. The cubic root of 2871857 is about 142.1415140183.

The spelling of 2871857 in words is "two million, eight hundred seventy-one thousand, eight hundred fifty-seven".